I had my flu vaccine an hour and a half ago by a pharmacist in Boots who admitted he didn't do them often as he's a locum. He injected very high on the shoulder and fast, so I heard that squirty sound. It bled a couple of drops. It was a bit stingy so I pressed the area lightly and it is squelching like there is a bubble or air or liquid underneath the area. I'm worried that he:
a) injected too high and I am skinny
b) injected air
c) injected the liquid into blood vessel or under the skin
What is the squelching and is it dangerous?